INTEGRATED MANAGEMENT OF ANTHRACNOSE OF CHILLI CAUSED BY COLLETOTRICHUM CAPSICI IN WEST BENGAL CONDITION

Abstract

Different botanicals, fungicides and bioagents were evaluated in vitro and field condition against Colletotrichum capsici. Amongst fungicides it was found that at 150 ìg/ml concentration 100% inhibition in mycelial growth was recorded in Tebuconazole, Mancozeb and Trifloxystrobin + Tebuconazole and minimum inhibition in mycelial growth was recorded in Carbendazim(6.71%). Two isolates each of three bioagentsviz., Trichoderma harzianum, T. viride and Pseudomonas fluorescens were evaluated for their antagonistic properties against C. capsici. T. harzianum isolate Th-2 was found most effective giving 77.78% inhibition on the mycelial growth followed by T. harzianum isolate Th-1 inhibiting 74.00%. Among four botanical oils Garlic, Neem, Polyalthia and Citronella were tested for their in vitro efficacy against C. capsici at concentrations of 0.05%, 0.1% and 0.2%. Garlic oil at all concentrations and neem oil at 0.1% gave cent per cent inhibition of mycelial growth of the fungus followed by Polyalthia at 0.20% (84.45%). Under field condition, significant minimum disease severity of 4.85% was found in plot receiving seed treatment with garlic oil @ 0.5 ml/kg seed followed by three sprays of Trifloxystrobin+Tebuconazole (50%) @1g/litre water.